move: empty files finder to root

17-project-empty-file-finder/exercises/3-print-directories/main.go

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+package main
+
+// ---------------------------------------------------------
+// EXERCISE: Print the directories
+//
+//  Create a program that can get multiple directory paths from
+//  the command-line, and prints only their subdirectories into a
+//  file named: dirs.txt
+//
+//
+//  1. Get the directory paths from command-line
+//
+//  2. Append the names of subdirectories inside each directory
+//     to a byte slice
+//
+//  3. Write that byte slice to dirs.txt file
+//
+//
+// EXPECTED OUTPUT
+//
+//   go run main.go
+//     Please provide directory paths
+//
+//   go run main.go dir/ dir2/
+//
+//   cat dirs.txt
+//
+//     dir/
+//             subdir1/
+//             subdir2/
+//
+//     dir2/
+//             subdir1/
+//             subdir2/
+//             subdir3/
+//
+//
+// HINTS
+//
+//   ONLY READ THIS IF YOU GET STUCK
+//
+//   + Get all the files in a directory using ioutil.ReadDir
+//     (A directory is also a file)
+//
+//   + You can use IsDir method of a FileInfo value to detect
+//     whether a file is a directory or not: go doc os.FileInfo.IsDir
+//
+//   + You can use '\t' escape sequence for indenting the subdirs.
+//
+//   + You can find a sample directory structure under:
+//     solution/ directory
+//
+// ---------------------------------------------------------
+
+func main() {
+}

17-project-empty-file-finder/exercises/3-print-directories/solution/dir/.gitignore

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+*
+!subdir1
+!subdir2
+!.gitignore

17-project-empty-file-finder/exercises/3-print-directories/solution/dir/subdir1/.gitignore

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+*
+!.gitignore

17-project-empty-file-finder/exercises/3-print-directories/solution/dir/subdir2/.gitignore

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+*
+!.gitignore

17-project-empty-file-finder/exercises/3-print-directories/solution/dir2/.gitignore

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+*
+!subdir1
+!subdir2
+!subdir3
+!.gitignore

17-project-empty-file-finder/exercises/3-print-directories/solution/dir2/subdir1/.gitignore

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+*
+!.gitignore

17-project-empty-file-finder/exercises/3-print-directories/solution/dir2/subdir2/.gitignore

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+*
+!.gitignore

17-project-empty-file-finder/exercises/3-print-directories/solution/dir2/subdir3/.gitignore

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+*
+!.gitignore

17-project-empty-file-finder/exercises/3-print-directories/solution/dirs.txt

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+dir/
+	subdir1/
+	subdir2/
+
+dir2/
+	subdir1/
+	subdir2/
+	subdir3/
+

17-project-empty-file-finder/exercises/3-print-directories/solution/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+)
+
+func main() {
+	paths := os.Args[1:]
+	if len(paths) == 0 {
+		fmt.Println("Please provide directory paths")
+		return
+	}
+
+	var dirs []byte
+
+	for _, dir := range paths {
+		files, err := ioutil.ReadDir(dir)
+		if err != nil {
+			fmt.Println(err)
+			return
+		}
+
+		dirs = append(dirs, dir...)
+		dirs = append(dirs, '\n')
+
+		for _, file := range files {
+			if file.IsDir() {
+				dirs = append(dirs, '\t')
+				dirs = append(dirs, file.Name()...)
+				dirs = append(dirs, '/', '\n')
+			}
+		}
+
+		dirs = append(dirs, '\n')
+	}
+
+	err := ioutil.WriteFile("dirs.txt", dirs, 0644)
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+}